Butterhead lettuce is also known as boston or bibb lettuce and is a head lettuce that has a loose arrangement of leaves. It is known for its sweet flavour and tender texture.
So can rabbits eat butterhead lettuce at all?
Lets take a look at its nutritional data in particular its calcium, sugar, fat, fibre, sodium, phosphorus, and acidic content is of most interest as far as bunnies are concerned.
As you can see butterhead lettuce contains quite a bit of phosphorus, a little calcium, but a lot of acidic content. This means that although rabbits are renown for eating lettuce, and they absolutely love it, butterhead lettuce is not very good for them to eat.
They are fine to have a nibble at it, but because of the amount of acidic content that it has in it, rabbits should not eat any more than that.
Image "Lettuce (4988502260)" by Dwight Sipler from Stow, MA, USA - LettuceUploaded by Jacopo Werther. Licensed under CC BY 2.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Lettuce_(4988502260).jpg#mediaviewer/File:Lettuce_(4988502260).jpg